Term Kind Topic What it is
Cutover Planning practice Cutover Planning The plan for the moment of switching — including the decision points, the rollback, and the rehearsal that makes it survivable.
Cutover Runbook practice Cutover Planning The step-by-step plan for a migration event, including verification points, decision criteria and the rollback path, rehearsed before it is used.
Point of No Return Rollback Horizon, Commit Point practice Cutover Planning The step in a migration after which rollback would lose data or state - identified in advance, with a named authoriser and a stated recovery plan beyond it.